A scala library for parsing mathemitical expressions with support for parentheses and variables.
features:
- math operators:
+,-,*,/,**(power) - parentheses
( )and comma, - all function of
scala.math, except ofrandom,EandPI - variable name:
$with valid Java variable name
- maven
<dependency> <groupId>io.github.facaiy</groupId> <artifactId>math-expression-parser</artifactId> <version>0.0.2</version> </dependency>
A simple example:
import io.github.facaiy.math.expression.MathExp
val str = "1.0 + sqrt(2 * $a1) + $a2 ** 2"
val ex = MathExp.parse(str)
val variables = Map("a1" -> 2, "a2" -> 1)
val output = ex.eval(variables)
// output = 4.0
val output1 = ex.eval(Map("a1" -> 8.0, "a2" -> 2))
// output1 = 9.0# Ref: https://central.sonatype.org/pages/apache-maven.html
mvn release:clean release:prepare
mvn release:perform
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